2018 takes the podium as one of the hottest years on record. Let’s look deeper.

"We've known since the 1980s that Earth has had a fever," stressed Sarah Green, an environmental chemist, in a recent interview. That fever continued, undiminished, in 2018. NASA's Goddard Institute for Space Studies keeps track of Earth's changing temperatures with a data bank that reaches back to the 1880s. This ... read more